Question

the operator is used when pages found in the search must contain all the words you have
I AND
ll OR
III NOT

​

Answer 1

Explanation:

Carbon monoxide is produced when fuels such as gas, oil, coal and wood do not burn fully. Burning charcoal, running cars and the smoke from cigarettes also produce carbon monoxide gas. Gas, oil, coal and wood are sources of fuel used in many household appliances, including: boilers